# COMAR Title 26 — Department of the Environment

## Subtitle 10 — Oil Pollution Control and Storage Tank Management

### Chapter 07 — High Risk Oil Storage Facilities

#### Regulation .06 Detection of Levels of Concern.

*COMAR 26.10.07.06*

If the concentration of benzene, toluene, ethylbenzene, total xylenes, or MTBE is detected at equal to or greater than the levels of concern defined in Regulation .02B of this chapter in a groundwater sample collected and analyzed in accordance with Regulations .03—.05 of this chapter, an owner of a new or existing gasoline UST system shall:

A. Within 24 hours of receiving an analytical laboratory report that shows the detection, report the sampling results to the Department;

B. Within 48 hours of receiving an analytical laboratory report that shows the detection, initiate an investigation both on-site and off-site of the oil storage facility in accordance with COMAR 26.10.08.02—.04; and

C. In accordance with COMAR 26.10.09.07, develop a corrective action plan under the direction of the Department.